Mark Dix & Paul Riley 
Discovering AutoCAD 2014 (2-downloads) [PDF ebook] 

Discovering Auto CAD 2013 presents a hands-on, activity-based approach to the use of Auto CAD as a drafting tool-complete with techniques, tips, shortcuts, and insights that improve efficiency. Topics and tasks are carefully grouped to lead students logically through the Auto CAD command set, with the level of difficulty increasing steadily as skills are acquired through experience and practice. Straightforward explanations focus on what is relevant to actual drawing procedures, and illustrations show exactly what to expect on the computer screen.